'Grenade' No. 1 on the U.S. record chart

LOS ANGELES, Feb. 3 (UPI) -- Bruno Mars's "Grenade" is No. 1 on the U.S. record chart for a fourth week, Billboard.com reported Thursday.

Coming in at No. 2 on the Billboard Hot 100 is Pink's "F**kin' Perfect," followed by Katy Perry's "Firework" at No. 3, Wiz Khalifa's "Black and Yellow" at No. 4 and Enrique Iglesias' "Tonight (I'm Lovin' You)" featuring Ludacris & DJ Frank E at No. 5.

Rounding out the top tier are Rihanna's "What's My Name?" featuring Drake at No. 6, Pitbull's "Hey Baby (Drop It to the Floor)" featuring T-Pain at No. 7, Britney Spears's "Hold It Against Me" at No. 8, Far*East Movement's "Rocketeer" at No. 9 and Ke$ha's "We R Who We R" at No. 10.